DS1776

更新时间： 2024-11-19 23:16:31

品牌	Logo	应用领域
美国国家半导体 - NSC		总线收发器
页数	文件大小	规格书
11页	207K
描述
PI-Bus Transceiver

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数据手册

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DS1776 数据手册

January 1996

DS1776

PI-Bus Transceiver

driver is designed to sink 100 mA from 2V and features a

controlled linear ramp to minimize crosstalk and ringing on

the bus.

General Description

The DS1776 is an octal PI-bus Transceiver. The A to B path

is latched. B outputs are open collector with series Schottky

diode, ensuring minimum B output loading. B outputs also

have ramped rise and fall times (2.5 ns typical), ensuring

minimum PI-bus ringing. B inputs have glitch rejection cir-

cuitry, 4 ns typical.

A separate high level control voltage (V_X) is provided to pre-

vent the A side output high level from exceeding future high

density processor supply voltage levels. For 5V systems, V_X

is tied to V_CC

Designed using National’s Bi-CMOS process for both low

operating and disabled power. AC performance is optimized

for the PI-Bus inter-operability requirements.

Features

n Mil-Std-883C qualified

n Similar to BTL

The DS1776 is an octal latched transceiver and is intended

to provide the electrical interface to a high performance

wired-or bus. This bus has a loaded characteristic imped-

ance range of 20Ω to 50Ω and is terminated on each end

with a 30Ω to 40Ω resistor.

n Low power I_CCL41 mA max

n B output controlled ramp rate

n B input noise immunity, typically 4 ns

n Available in 28-pin DIP, Flatpak and CLCC

n Pin and function compatible with Signetics 54F776

The DS1776 is an octal bidirectional transceiver with open

collector B and TRI-STATE^®A port output drivers. A latch

function is provided for the A port signals. The B port output

Pin Configurations

Pin Configuration

DS010875-2

Logic Symbol

DS010875-1

Order Number DS1776E/883 or DS1776J/883

See NS Package E28A or J28B

DS010875-3

TRI-STATE^®is a registered trademark of National Semiconductor Corporation.

DS010875

www.national.com

12 3 4 5 6 7...11

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